Potassium Carbonate → 4-(4-(2-Amino-2-methylpropyl)phenoxy)benzonitrile

HRID 1601474Notes

Reaction equation

HRID 1601474 reaction equation
C(O)(=O)C.[NH2:5][C:6]([CH3:16])([CH3:15])[CH2:7][C:8]1[CH:13]=[CH:12][C:11]([OH:14])=[CH:10][CH:9]=1.C([O-])([O-])=O.[K+].[K+].CC(N(C)C)=O.F[C:30]1[CH:37]=[CH:36][C:33]([C:34]#[N:35])=[CH:32][CH:31]=1>O.C1(C)C=CC=CC=1>[NH2:5][C:6]([CH3:16])([CH3:15])[CH2:7][C:8]1[CH:13]=[CH:12][C:11]([O:14][C:30]2[CH:37]=[CH:36][C:33]([C:34]#[N:35])=[CH:32][CH:31]=2)=[CH:10][CH:9]=1

Participants

7

Reactant 4

HCID 11430Potassium CarbonateHCID 145174-FluorobenzonitrileHCID 31374DimethylacetamideHCID 219232504-(2-Amino-2-methylpropyl)phenol acetic acid

Product 1

HCID 221477714-(4-(2-Amino-2-methylpropyl)phenoxy)benzonitrile

Reagents, catalysts & solvents 2

HCID 962WaterSolvent2×HCID 1140TolueneSolvent3×

Conditions

Temperature
87.5 °C

Procedure

A mixture of 4-(2-amino-2-methylpropyl)phenol acetic acid salt (45.06 g, 200 mmol), powdered K2CO3 (69.1 g, 500 mmol), and DMAC (550 mL) was heated to 75-100° C. Toluene (166 mL) was added, and the mixture was slowly heated to reflux at 134° C. The reflux temperature was raised by distillation of toluene and water into a water trap until the temperature reached 141° C. The mixture was then allowed to cool to below 100° C. at which point 4-fluorobenzonitrile (24.46 g, 202 mmol) was added along with 50 mL of toluene. The mixture was again heated to reflux at 140° C. with water being collected in a toluene-filled water trap for 4 h. The mixture was allowed to cool to room temperature, and the solids were filtered and rinsed with toluene. The filtrate was concentrated on a rotary evaporator to 77 g of syrup which was dissolved in EtOAc (400 mL). This solution was extracted with water (400 mL), and the aqueous layer was back-extracted with EtOAc (100 mL). The combined organic layers were washed with water (3×400 mL) and concentrated in vacuo to 53.4 g (100%) of oil which was >98% pure by HPLC analysis: 1H NMR (300 MHz, DMSO-d6) NMR was consistent with the desired product;

Workup

  1. temperaturethe mixture was slowly heated
  2. temperatureto reflux at 134° C
  3. customreached 141° C
  4. temperatureThe mixture was again heated
  5. customcollected in a toluene-
  6. additionfilled water trap for 4 h
  7. temperatureto cool to room temperature
  8. filtrationthe solids were filtered
  9. washrinsed with toluene
  10. concentrationThe filtrate was concentrated on a rotary evaporator to 77 g of syrup which
  11. dissolutionwas dissolved in EtOAc (400 mL)
  12. extractionThis solution was extracted with water (400 mL)
  13. extractionthe aqueous layer was back-extracted with EtOAc (100 mL)
  14. washThe combined organic layers were washed with water (3×400 mL)
  15. concentrationconcentrated in vacuo to 53.4 g (100%) of oil which

Sources & evidence

ORD record
ord-cde2df281fc34d06a706270217c42655
Source dataset
uspto-grants-1999_11
Patent number
US05977154

Reaction notes

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